+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   1310 Villigera (1932 DB) Classification: Mars-crossing Asteroid          SPK-ID: 2001310 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO256871 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.3560653 n/a   a 2.3919818 n/a AU q 1.5402801 n/a AU i 21.07583 n/a deg node 357.34547 n/a deg peri 88.66362 n/a deg M 10.58291 n/a deg tp 2456360.7773843 (2013-Mar-09.27738430) n/a JED period 1351.2485368 3.70 n/a n/a d yr n 0.26642027 n/a deg/d Q 3.2436835 n/a AU   Orbit Determination Parameters    # obs. used (total)      720      first obs. used      1932-??-??      last obs. used      2013-03-14      # oppositions      26      planetary ephem.      DE403      condition code      0      fit RMS      0.50      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.358  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.45 mag n/a PDS3 (MPC 17261)   rotation period rot_per 7.830 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Koff, R.A. (2002) Minor Planet Bul. 29, 25-26.] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] B-V BV .905 mag .020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=24.95 deg. U-B UB .445 mag .023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=24.95 deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices 1310 Villigera (1932 DB)          Discovered 1932-Feb-28 by Schwassmann, A. at Bergedorf and A. Wachmann. Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1932 DB = 1964 TC  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-19 20:30 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin